While bakers can purchase self-rising flour, that flour and regular flour doesn't include yeast. Flour includes yeast when someone mixes the two ingredients together, such as in bread making.

What flour has yeast in it?

1. White flours are milled from the endosperm or inner part of the wheat kernel. Bread flour is the preferred flour for yeast-leavened products. It is made from hard wheat and contains high amounts of the gluten-forming proteins.

What does all-purpose flour contain?

All-purpose flour is made from wheat. The germ and bran are removed (the stuff present in whole-wheat flour) leaving the endosperm to increase shelf life. The bag contains a mixture of hard wheat (with more gluten) and soft wheat.